<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <form method="post" action="index.html">
        <div>用户名:<input name="username" /></div>
        <div>密码:<input name="password" /></div>
        <div><input type="submit" value="提交"></div>
    </form>
</body>

</html>